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![USA ZIP Code](https://zip.postcodebase.com/files/image/usa_zip.png)
This is the U.S. territories ZIP code website, which contains 861 ZIP codes, 139 cities, 88 counties, and more than 317,020 ZIP+4 codes. Each 9-digit ZIP code corresponds to one or several U.S. territories addresses.
Besides, there are also some tools related to ZIP code or address. For example, address verification, full ZIP code search, random address generator, etc.
State List
![img_state](https://zip.postcodebase.com/files/image/img_state.png)
45 millions 9-digital ZIP codes 5 plus 4 are divided into sub domain websites of 50 States and one District, you can find more information, such as zip code 5, zip code 5+4, city and county information and etc. Below is the states list of U.S. Click title to enter detail ZIP code information of every state.
Other Areas
![img_region](https://zip.postcodebase.com/files/image/img_region.png)
In addition to the states, the United States also includes some military areas and other islands that have been assigned zip codes. Click the button to view more information.
U.S. Territory Dataset
![icon_datas](https://zip.postcodebase.com/files/image/icon_datas.png)
Please check ZIP Codes by County FIPS:
How to write a U.S. envelope?
![img_envelope](https://zip.postcodebase.com/files/image/img_envelope.png)
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First, you need to fill in the recipient's mailing information in the center of the envelope. The first line is the recipient's name, the second line is the street address with a detailed house number, and the last line is the city, state abbr, and ZIP Code.
Second, write the sender's information on the left top corner of the envelope. If your mail cannot be delivered, it will return to the sender's address.
Finally, don't forget to stick the stamp on the right top corner. Otherwise, the letter will not go into the delivery process.
Here is the envelope example below.
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For more explanation, please read the official document: USA.pdf (English)
Population
![img_population](https://zip.postcodebase.com/files/image/img_population.png)
The population of the state American Samoa was 55,519 in 2010 and reached 49,437 in 2019 with an increase of –6,082. Now the state American Samoa is the 56th state by population size in the U.S. and accounts for 0.02% of the total U.S. population.
The population of the state Guam was 159,358 in 2010 and reached 168,485 in 2019 with an increase of +9,127. Now the state Guam is the 53th state by population size in the U.S. and accounts for 0.05% of the total U.S. population.
The population of the state Northern Mariana Islands was 53,883 in 2010 and reached 51,433 in 2019 with an increase of –2,450. Now the state Northern Mariana Islands is the 55th state by population size in the U.S. and accounts for 0.02% of the total U.S. population.
The population of the state Puerto Rico was 3,725,789 in 2010 and reached 3,193,694 in 2019 with an increase of –532,095. Now the state Puerto Rico is the 31th state by population size in the U.S. and accounts for 0.96% of the total U.S. population.
The population of the state Virgin Islands was 106,405 in 2010 and reached 106,235 in 2019 with an increase of –170. Now the state Virgin Islands is the 54th state by population size in the U.S. and accounts for 0.03% of the total U.S. population.
Area | 2019 Census Data | 2010 Census Data | Increase | Increase(%) | Rank | Proportion of total population(%) |
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American Samoa | 49,437 | 55,519 | –6,082 | –10.95% | 56th | 0.02% |
Guam | 168,485 | 159,358 | +9,127 | 5.73% | 53th | 0.05% |
Northern Mariana Islands | 51,433 | 53,883 | –2,450 | –4.55% | 55th | 0.02% |
Puerto Rico | 3,193,694 | 3,725,789 | –532,095 | –14.3% | 31th | 0.96% |
Virgin Islands | 106,235 | 106,405 | –170 | –0.16% | 54th | 0.03% |